Cylinder knob-lock.



No. 823,348. PATENTED JUNE 12, 1906. J. MONTGOMERY.

CYLINDER KNOB LOCK. APPLICATION FILED PEB.17.1905.

2 SHEETS-SHEET 1.

1W VENTOR minsw s snmm ca, Pnovmmwcmmms, m n-mum p PATENTED JUNE 12, 1906.

J. MONTGOMERY. CYLINDER KNOB LOOK. APPLICATION FILED FEB. 17. 1905.

2 SHEETS-SHEET 2.

WITNESSES IWVEWTOR 7% M m 77690-1; fliiorneys.

UNITED STATES PATENT OFFICE.

GYLLNDEB KNOB-LQQK- Specification .of Letters 1?a-t ent.

enteg1 June- 2, 1906- Application filed February 1'7, 1905. gerial No. 246,015-

To all whom it may cancern.-

Be it known that I, JOHN MonTGoMnnY, a subject of the King of Great Britain, residing at the city of Toronto, ,county of York, Province of Ontario, Canada, have invented a certain new and useful Improvement in Cylinder Knob-Locks; and I declare the following to be a full, clear, and exact description of the invention, suchas will enable othersskilled in the art to Which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to cylinder knoblocks.

It has for its object an improved combined latch and knob-lock adapted to be used with doors of ordinary construction and to be attached to the door as a mortise-lock without cutting the deep and wide mortise that is usually required, but by simply mortising to receive the face-plate and boring for the insertion of the latch-shank, with a bore throughthe door for the passage of the knob-spindle.

In the drawings, Figure 1 is a plan view.

showing the latch and its connection withthe knob-spindle. Fig. 2 is a vertical section longitudinal of the latch-shank and across Fig. 3 is a section length- 1 Fig. 4 shows oneend of the knob-spindle with the unlockingkey inserted. Fig. 5 is an elevation, partly} in section, of the assembled lock. Fig. 6 shows the means of attaching the knob to the E the knob -spindle. Wise of the knob-spindle.

spindle.

a shoulder at the backofthe projectile part of the latch-bolt 3 is a spring 4, which tends to hold the latch projected. Atthe back ofthe latch-bolt is a yoke-5, that engages around the spindle 6. The yoke 5 is provided with slots 5 on both its upper and lower sides and with an entrance-notch 5 to each slot. At the back of the yoke where it bends around the spindle'is'notch 7, that extends from the side inward deep enough to receive the end of a pin 8, whichserves jasthe locking means between the spindle and the latch.

The spindle 6 is provided with a slot 10 near its middle point. Within the sleeve is an arbor 11, threaded at its middle part and provided I at its ends with plugs 18, which fill the bore of the sleeve, (except for a keyhole hereinafter mentioned.) the threaded middle part of the arbor 11 isa running-nut12, provided jwitli a pin 8, that projects through the slot 10 and terminates with a head 8 A knob is securedto' each end of the spindle 6. Two pins 5 5 project'radially from the spindle and engage in'the slots 5 of the yoke. The pins 5 are located to oscillate in a path which if continued to the full revolution would coincide with thepath of one end of the slot 101 The slot i'slong enough to allow the pin 8 to be run along the slot 'to a position to oscillate without engaging the yoke, or it may berun along the slot 10 until it will engage in the notch 71' At either end of the spindle is a rotative tumbler carrier 17, providedwith a slot 14 for the reception of a locking-tumbler 15, and in the spindle 6 in a position to register with the slot 14 is a groove 16. The locking-tumbler 15 is pivoted to hang in the slot 14 and to normally hang with one end projecting into the groove 16, in which'position the tumblercarrier and the sleeve are lockedand are not capable of independent rotation. At the outer end each tumbler-carrier 17 has a peripheral groove 19, in which engages a pin 20, that is inserted through the spindle 6. Each tumbler-carrier 17 is provided with a keyway or keyhole 21, through which the key 22 may be inserted under and past the tumbler 15, and if the'proper key be inserted'the tumbler l 15 will be swung until it is disengagedfrom its The face-plate 1 is a rectangular piece of 5 metal adapted to be inserted in a shallow j mortise in the edgeof the door. To the back of the faceplate 1 is secured a guide-bracket 2, through which passes the ste'm 3 of the latchbolt. Between the back of the bracket 2 and i position within the groove 16,"atwhich time the key projects into the keyway 22 in the plug 18, which is secured to'the cnd'of the aribor' 11 in position to rotate .with it, and the turning of the key turns the arbor'without turning the spindle 6. The rotation of the arbor produces alon itudinal movement of the .pin 8 along the ails of the sleeve, because of the threading on the arbor 11,.which engages through the 'swi'veled' nut '12. If the pin 8 be drawn into the notch 7 ,the spindle can no longer rotate.

The tumbler 15 may be compared to a segmental rack having an irregular outline or one that is suspended eccentric to its center of curvature with ratchet-teeth or key-teeth tion at a time when the key is in a position to turn the arbor and at the same time escape the pin 20, for which purpose the key must be notched. In inserting this lock in place it is only necessary to bore a single round hole from the'edge of the door to meet a sinle round hole that is bored through the door or the knob-spindle. Each rose 24 is preferably provided With a neck 25, that centers the knob-spindle.

The headed pin 8 by engagement with its large head over that portion of the yoke 5 which engages around the sleeve 6 and is im mediately adjacent to the inner end of the notch 7 prevents the latch from being pushed inward and the door unlocked by the insertion of any thin or sharp object in front of the latch. That portion of the spindle which in the assembled structure projects from the door and is intended to engage within the hollow of the knob is provided with a number of screw-holes 30, arranged along a s iral line around or partly around the spinle, and the knob is provided with a shank 31,

with a single screw-hole for the screw 32. The

screw engages in that one of the holes which brings the shank of the knob as close to the surface of the door as the neck 25 of the rose 24 will permit.

The removal of the knob does not give access to the operative parts of the locking mechanism, nor can the spindle be pushed through the door or out of place without first gaining access to the projectile part of the latch, which must be pushed back at a time when the pin 8 is not in position for the head 8 to engage over the yoke. There is a mutual interlocking of the several parts in that the engagement between pin 8 and yoke prevents the spindle from turning. Engagenent between head 8 and the yoke prevents the latch from being pushed back, and engagement of the pins 5 5 in the slots of the yoke prevents the spindle from moving to either side.

What I claim is 1. In a cylinder knob-lock, in combination, a rotary spindle provided with projecting pins, a latch provided with a yoke adapted to engage around said spindle, said yoke being provided with slots wherein said pins engage, and a member movable with respect to said spindle provided with a projecting portion, normally out of engagement with said yoke adapted to be moved to a position of locking engagement therewith, substantially as described.

2. In a cylinder knob-lock, in combination with a rotary spindle slotted near its middle point, a rotary arbor within said spindle having a screw-threaded center portion, a running-nut on said screw-threaded portion provided with a pin extending through the slot,

rotative tumbler-carriers within said spindle between each end of the arbor and the ends of the spindle, means located near each end of the spindle for holding said tumbler-carriers from escape, a tumbler for each carrier adapted to interlock the carrier and the spindle, and to be unlocked only by its appropriate key, a yoke engaging about the spindle provided with a slotted portion adapted to be engaged by said pin, and a latch-bolt carried on the other end of the yoke from the spindle-engaging portion, substantially as described.

3. In a cylinder knob-lock, the combination of a latch-bolt, a slotted yoke carrying the same, a spindle passing therethrough, that portion of the spindle engaging said yoke having a plurality of projections adapted to engage in the slotted portions thereof, a pin member also projecting from said engaging portion of the spindle, a running-nut within the spindle whereon said pin is mounted and means adapted to be manuallyactuated for throwing said pin to interlocking engagement with said yoke, substantially as described.

4. In a knob-lock, in combination a spindle provided with projecting pins, a latchbolt, a yoke therefor provided with bayonetslots for engagement with said pins, whereby the yoke and the spindle can only be disengaged when the projectile part of the latch is retracted, substantially as described.

5. In a cylinder knob-lock, in combination, a latch-bolt, a yoke carrying the same, aspindle engaging through said yoke and adapted to be interlocked therewith, an arbor within said spindle, and means carried by said arbor and extending outside of said spindle adapted to be moved with said arbor with respect to said spindle into a position of binding engagement with said yoke.

6. In acylinder knob-lock, in combination a rotary spindle provided with projecting pins, a latch-bolt provided with a yoke member engaging thereabout, said yoke being provided with slots wherein said pins engage, an arbor within said spindle and rotatable with respect thereto, said arbor being screwthreaded along its middle portion, a running nut on said screw-threaded portion, said nut carrying a headed pin extending outside said spindle, and means for actuating said arbor to cause said headed pin to bindingly engage said yoke, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

JOHN MONTGOMERY. Witnesses:

A. J. GORRIE, GIRARD S. RENEL. 

